With the rapid development of the market economy, the import and export trade of the textile industry has increased significantly, and the work of fabric burst strength testing involving production and new product development and trade processes has also increased significantly. Therefore, an effective, accurate and economical new equipment and detection method (standard) is particularly important.
Since textile materials, especially woven fabrics, knitted fabrics and non-woven products, have poor quality uniformity and large performance dispersion, it is necessary to test various quality indicators, and a considerable sample size is required to obtain a representative overall performance. Depending on the test method, tensile strength is not available for some fabrics (such as knitwear and lace), but can be substituted by the burst strength test. Fabrics are susceptible to simultaneous fracture of warp and weft, and oblique force, especially some knitted fabrics (such as weft knitting) have the characteristics of vertical stretch, lateral shrinkage, vertical and horizontal and mutual influence, such as tensile strength test, which needs to be tested separately for warp and weft up and down tests,
Research Status and Development Trend of Electronic Bursting Intensity Meter
In recent years, my country has made remarkable achievements in textile standards and measurement, and has developed a large number of testing instruments that are close to or have international standards.
However, the research and development of pneumatic blasting equipment is basically monopolized by foreign countries (mainly due to the lack of a high-speed, highly automated device). Although my country has developed a hydraulic blasting strength testing machine as early as a few years ago, the research and development in compression blasting is basically at a standstill.
The main research and development content of the electronic bursting strength meter
The expansion, expansion and fracture of the fabric under the load perpendicular to the plane of the fabric are studied. Fabric bursting strength is an important mechanical index of fabrics. Since fabrics are often damaged by warp, weft, and oblique forces at the same time, especially some knitwear with characteristics such as vertical stretching, lateral shrinkage, vertical and horizontal, and mutual influence, such as tensile strength tests, warp and weft respectively and The slash test, as well as the burst strength allow for a one-time evaluation of fabric strength. Theoretically, it can be designed by adopting the principle of hydraulic or pneumatic diaphragm bursting. Hydraulic burst strength Tester has been widely used in different textile industries. But there are also many shortcomings that have been exposed. If it is inconvenient to use, it is not environmentally friendly, and the measurement time is long. The main purpose of our research and development is to develop a convenient, effective, accurate and economical expansion and breaking strength testing equipment to replace time-consuming and labor-intensive instruments.
This project requires a measurement range of 0 to 1200Kpa and a resolution of 0.02Kpa. It can make the fabric burst quickly in around 20ms. However, in the burst test, if the height of the chuck or the test cup is not enough, it will cause certain troubles. Therefore, we have designed an expansion height of up to 70mm, which can test products with a greater expansion degree, greatly expanding its application range.
It is more capable of testing the increasing elasticity of various fabrics. The precision mechanical design is adopted to solve or alleviate the force instability caused by excessive impact force, easily damaged sensor or diaphragm, and violent shaking of the whole machine.
Sources of electrical noise are filtered through a combination of software and hardware. In terms of mechanical noise, the noise is further reduced through the optimization of the transmission structure and connection. Solve the problem of small force high-speed test data accuracy.
The actual data acquisition frequency of this instrument needs to be more than 2000 times/s. We use a 32-bit CPU with an AD with a sampling frequency greater than 200KHz, and take measures such as wide channel, anti-interference, and reasonable filtering to achieve an actual data acquisition frequency of 2000 times/s.
